/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.spark.sql.hive.execution;

import org.apache.hadoop.hive.ql.exec.UDF;

import java.util.*;

/**
 * UDF that returns a nested list of maps that uses a string as its key and a list of ints as its
 * values.
 */
public class UDFToListMapStringListInt extends UDF {
  public List<Map<String, List<Integer>>> evaluate(Object o) {
    final Map<String, List<Integer>> map = new HashMap<>();
    map.put("a", Arrays.asList(1, 2));
    map.put("b", Arrays.asList(3, 4));
    return Collections.singletonList(map);
  }
}
